package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     * @param shopcartDto
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shopcartDto) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shopcartDto, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if (list != null && list.size() > 0){
            ShoppingCart cartServiceOne = list.get(0);
            cartServiceOne.setNumber(cartServiceOne.getNumber() + 1);
            shoppingCartMapper.update(cartServiceOne);
        }else {

            Long dishId = shopcartDto.getDishId();
            if (dishId != null){
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setName(dish.getName());
            }else {
                Long setmealId = shopcartDto.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setAmount(setmeal.getPrice());
            }

            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> shoppingCart() {
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(BaseContext.getCurrentId()).build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    /**
     * 删除购物车
     * @param shoppingCartDTO
     */
    @Override
    public void sub(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        ShoppingCart cartServiceOne = list.get(0);
        Integer number = cartServiceOne.getNumber();
        if (number == 1){
            shoppingCartMapper.deleteById(cartServiceOne.getId());
        }else {
            cartServiceOne.setNumber(number - 1);
            shoppingCartMapper.update(cartServiceOne);
        }
    }

    /**
     * 清空购物车
     */
    @Override
    public void clean() {
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
    }
}
